Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 352)

• For TI over FCR, failover must be enabled in the TI zones in the edge fabrics and in the backbone
fabric.
• TI over FCR is not supported with FC Fast Write.
• ETIZ over FCR is not supported.
• For the FC8-16, FC8-32, FC8-48, FC8-64, and FX8-24 blades only: If Virtual Fabrics is disabled,
two or more shared area EX_Ports connected to the same edge fabric should not be configured in
different TI zones. This configuration is not supported.
Fabric-Level Traffic Isolation in a backbone fabric
For Fibre Channel Routed (FCR) environments, you can use TI zoning if you want traffic isolation only
at the fabric level and not at the device level.
For example, two fabrics within a MetaSAN need to communicate only with each other. There is no
other traffic across the backbone that goes from either of these edge fabrics to any other edge fabric in
the MetaSAN. In this case, all of the traffic entering the FCR backbone from one of these edge fabrics
will go to the other edge fabric. If these two edge fabrics are connected to two different backbone
switches (FC routers), then traffic between these fabrics can be isolated to a specified set of links
within the backbone fabric using one of two methods:
• TI over FCR, which includes the PWWN of devices and maintains device level isolation
• TI zoning in the backbone, which provides fabric level isolation
If device-level isolation is needed from one edge fabric to another, then use TI over FCR using Port
World Wide Names (PWWNs). However, if there is no need for device-level isolation, but a need for
fabric-level isolation, then use Fabric-Level Traffic Isolation, described in this section.
TI over FCR is described in Traffic Isolation Zoning over FC routers on page 348.
If two edge fabrics are connected to two different backbone switches, then traffic between these
fabrics can be isolated to a specified set of links within the backbone fabric using TI zoning in the
backbone without including device PWWNs. This is called Fabric-Level Traffic Isolation, as shown in
the following figure.
Fabric-Level Traffic Isolation in a backbone fabric
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